package cn.youruan.demo.config;


import cn.youruan.demo.common.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Slf4j
@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {

//   设置静态资源映射
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        log.info("开始进行静态资源映射...");
        registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
        registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");
    }

    /**
     * 扩展springMVC的消息转换器
     * @param converters
     */
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        //1.创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
        //2.设置对象转换器,底层使用jackson将java对象转换为json
        messageConverter.setObjectMapper(new JacksonObjectMapper());
        //3.将我们创建的消息转换器追加到转换器容器中,位置放在第0位
        converters.add(0,messageConverter);
    }
}
